NEW SPECIES OF EDBIGPHTHALMA. 231 



joint thick and as long as tlie next two, Srd joint much more 

 slender and about one-third the length of the second. 



Lower antennae about three-quarters the length of the upper ; 

 last joint of the peduncle rather shorter than the preceding 

 joint. 



Maxillipedes strong ; dactylus of the palp longer than the 

 preceding joint, very strong, and with a fringe of minute setules 

 on the upper margin ; 5th joint much shorter than the 4th. 



Gnathopoda very unequal, the propodoa of the 1st being about 

 one-fourth of the size of that of the 2nd pair. The first pair have 

 the anterior margin of the 5th joint (propodos) 5 longer than 

 that of the 4th ; dactylus about | the length of the propodos, 

 the distal half serrate ; posterior margin curved, the distal third 

 being minutely crenate, with a spine about one-third of the length 

 from the carpus. The 1st joint is as long as the 5th, the 2nd 

 and 3rd very short : the carpus baa the posterior margin convex, 

 setose, with a minute tubercle in the middle. 



The second pair have the propodos ovate, longer than the other 

 joints together, having the palm defined by a small tooth two- 

 fifths of the distance from the carpus to the base of the dactylus; 

 the distal portion of the palm is divided into three lobes with 

 crenate edges by two deep sinuses. The setse on the lobes are of a 

 peculiar form, being divided at some distance from their base into 

 two unequal branches. The first joint is about half as long again 

 as the next three, the carpus being very short, hollowed to receive 

 the base of the propodos, and produced posteriorly. 



The perseopoda and third uropoda resemble those of P. pul- 

 chellus, Sars. 



The telson is spoon-shaped and notched at the tip to about 

 one-fourth of its length. This last feature does not agree with 

 Sars's definition of the family (Parampbithoidse) as having the 

 telson " wath the tip not incised." Since, however, the telson 

 itself in other respects, as well as the entire animal, agrees with 

 Sars's description of Parapleustes, I am not disposed to make 

 a new genus of it. 



Length 8 mm. 



This species may be at once distinguished from all others 

 of the genus by the shape and large relative size of the 2nd 

 gnathopods, the disproportion between these and the first pair 

 being much greater even than in P. latipes (M. Sars). 



Four specimens in the collection of the Dublin Museum of 



LINN. JOURN. — ZOOLOGY, VOL. XXVI. 17 



